Electrical problems. Need help.

I need help diagnosing a problem. I have no speedometer, and the abs light and brake light is on. Also no cruise control, or horn. The cruise light does come on though. I can hear a relay click when I go to honk the horn too.

So far I have replaced the clock spring, the speed sensor on the rear diff, and checked the fuses under the hood. I also checked wires on the firewall going to the abs controller. I got a dtc code once p0581. I cleared it and I never came back. Anyone have any of these problems before?

Sounds like another fried PCM! Drivers side under hood but first clean all your battery connections!

I'll clean the battery terminals. The truck hasn't been driven much in about 6 months. Possible bad PCM? It only has a little over 100k miles also. Wouldn't PCM problems throw more dtc codes?

If part of the board is corroded it causes all kinds of issues! Google it!

Are you sure you have both good batteries? Clean and Inspect the ECM Connections first.